More than 5 millions pilgrims went on the 15th of Shaban (Mid Shaban) to Karbala at the Shrine of Imam Husain 20 July 2011.[38]

Over 5 million people attended the World Youth Day 1995 in Manila, Philippines, to see Pope John Paul II. It was the largest papal crowd in history, until being surpassed on 18 January 2015 during the visit of Pope Francis also in Manila.[39]

4 million pilgrims visit Imam Ali Shrine in Iraq on the anniversary martyrdom of the first Shia Imam on 28 June 2016.[41]

More than 2 million Muslims gather for the important ritual as part of Hajj 2016[42]

An estimated 2.8 million people made the annual Hajj to Mecca, Saudi Arabia (excluding unregistered pilgrims which were over 0.75 million, the number of pilgrims would then be over 3.5 million) in November 2010.[43]

An estimated 3.16 million people made the annual Hajj to Mecca, Saudi Arabia in 2012 (1.4 million Saudis and 1.75 million foreigners)[53]

An estimated 3.2 million people gathered for the annual feast of the Santo Niño de Cebú (Child [Jesus] of Cebu) on the third Sunday of January 2014. The crowd attended the solemn procession in the main streets of Cebu City, Philippines.[54][55][56]

An estimated 3 million people welcomed Benazir Bhutto on her return from exile in 1986 in Lahore. The procession covered the 12 kilometer distance from the Lahore airport to Minar e Pakistan in over ten hours. The crowd accumulated at gardens of the landmark accommodated over 1.5 million people with queues of cars and trucks reaching outside the then city limits miles away.[68]

An estimated 2.8 million people made the annual Hajj to Mecca, Saudi Arabia (excluding unregistered pilgrims which were over 0.75 million, the number of pilgrims would then be over 3.5 million) in November 2010.[43]

An estimated 2 million Hindu women gathered at the Attukal Temple in Kerala, India on 4 March 2007, making it the largest gathering of women in history, overtaking the record set by the same festival on 23 February 1997.[85]

More than 2 million Muslims gather at Mount Arafat for the important ritual as part of Hajj 2016[42]

An estimated 2 million people gathered at Raja Bazaar, Rawalpindi on 24 December 2013 after threats from Takfiri groups due to Ashura riots Shia Muslims gathered to commemorate Chehlum of Imam Hussain. Takfiris despite all their threats had to retreat.[95]

An estimated 1.5-2 million people in Hong Kong (the city at the time had a population of roughly 5.5 million) expressed their support for the students in the Tiananmen Square protests of 1989. The line of people extended from North Point to Sheung Wan, with all six lanes of King's Road (Hong Kong), Hennessy Road and Des Voeux Road crowded with people. Many underground MTR stations on Hong Kong Island were full of people and many people who could not participate in the demonstration above ground were stuck in the congested MTR stations, therefore the exact amount of demonstrators could only be estimated to around 1.5-2 million people.[100]

An estimated 1.6 million people (30 percent of Lebanon's 4 million population) gathered in Beirut, Lebanon on 14 March 2005 to demand an end to the Syrian military presence in Lebanon. This event is known as the Cedar Revolution.[104]

An estimated 1.4 million attended World Youth Day 2011 (16–21 August) in Madrid[112]

An estimated 1.3 million people attended the 2015–2016 Cleveland Cavaliers Basketball NBA Championship Parade 22 June 2016. The victory ended a 52-year drought of no major professional sport championships for the City of Cleveland.[113]

An estimated 1.25 million people attended a papal mass given by Pope John Paul II in the Phoenix Park, Dublin, Ireland on 29 September 1979. The estimated attendance was about one third of the population of Ireland gathered in one expansive public area.[114]

More than 1.2 million Venezuelans attempted to peacefully march in the "Mother of All Marches" throughout Venezuela before they were repressed by authorities on 19 April 2017, with the demonstrations resulting from the 2017 Venezuelan constitutional crisis.[115]

An estimated 1 million people participated in what is considered the largest procession in the history of New Delhi, India on 8 October 1970 in commemoration of Hans Ji Maharaj, led by his son Guru Maharaj Ji (now Prem Rawat).[125][126]

An estimated crowd of over 1 million revelers attended Love Parade in Essen, Germany on 25 August 2007.[127]

An estimated crowd of over 1 million Colombians gathered in Bogotá, Colombia on 4 February 2008 to protest against FARC.[128]

A method of determining how many people are at an event is the scientific analysis of photographs, video images, or both. Based on the quality of the image, it is possible to do a physical head count or to estimate attendance based on the density of people within similar areas. This permits the estimation of people over large areas or where parts of the image are obscured. An extensive discussion of how images were used to estimate the number of attendees at the Million Man March can be found at the Center for Remote Sensing at Boston University's website.[141]

^Sharat Pradhan (11 February 2013), Neil Fullick, ed., "Allahabad stampede kills 36 Kumbh Mela pilgrims", Reuters, retrieved 15 November 2017, The festival grows in size every time it is held and is considered the world’s largest temporary gathering of people. Officials said some 30 million visited the site on Sunday, considered the most auspicious day to bathe in the river.

^Nunnally, Derrick (November 1, 2008). "A party for, oh, 2 million of their closest friends". Philadelphia Inquirer. p. F2. Some in the news media guessed two million, about the same number long tied to Flyers parades in '74 and '75, and more than the current population of Philly.

^Navbharat Times, 10 November 1970 (from Hindi original) "A three-day event in commemoration of Sri Hans Ji Maharaj, the largest procession in Delhi history of 18 miles of procession; it culminated in a public event at India Gate, where Sant Ji Maharaj addressed the large gathering"

^Hindustan Times, 9 November 1970 (English) "Roads in the Capital spilled over with a 1,000,000 processionists, men, women and children marched from Indra Prasha Estate to the India Gate lawn."